Malicious PDF — malware analysis report

Static analysis result for SHA-256 98088ae89f5f32d2…

MALICIOUS

PDF

89.5 KB Created: 2021-03-27 19:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 80759bdca58211f931cb5efc6b92d5fc SHA-1: dfff128e214725d52b6c4fd97cfa64da78619ada SHA-256: 98088ae89f5f32d2651de84ad5f1d5182948843938864d732a113a23be3cc3a7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://fokemale.ru/123?utm_term=lagu+apologize+remix PDF link annotation
    • https://dixozetazexode.weebly.com/uploads/1/3/4/4/134472526/vudusakeliw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446398/normal_602f52acbda26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461483/normal_604e0e767f394.pdfIn PDF document text
    • https://zenisitidijo.weebly.com/uploads/1/3/4/3/134309999/waxoxovogufadadip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369525/normal_5fff62ba81370.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/cTW7ib3/1729139584.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/cNhjgjL/the_adventures_of_tintin_books_in_order.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413578/normal_5fe1b4238fa92.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/ievvieU/top_100_djs_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_6021234d8698a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zijivevip/descargar_warcraft_3_reign_of_chaos__frozen_throne_espaol_full_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/kuxobaxidom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeb0e392-cc08-4d1a-9e14-ba832505e973/tabla_de_densidad_y_viscosidad_del_agua_a_diferentes_temperaturas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d912e5d-a7f4-4572-89d5-605c60b6fa1e/dave_ramsey_budget_sheet_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50606a81-8cb7-4637-9906-54f1fb23a8e5/ponivekanodesafuropa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c64f7ec-da44-4aac-af6e-eb494922de44/how_to_clear_e4_error_on_omega_dishwasher.pdfIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_c0d99d738ba040b0b9646bfdf7abbbc8.pdf?index=trueIn PDF document text
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_bdff4970f1dc410698dd1ef7f459a0c5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c03c57cd-ea46-40cf-b4a5-cce3a1d13be3/star_citizen_download_error.pdfIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_2371ff82fc6a4e96a9cf078860c286ba.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11268 4716 bytes
SHA-256: 60c8d7ba5ae04b94b447c0ac9ef9846387b29a47c3d0814704ecac4505607233
font_01_sfnt_off0001227c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227C 13456 bytes
SHA-256: 5a09a645f1b80f27e60cb5c02d9f6d6891205ea397bf42cd8cc7533177f533d7
font_02_sfnt_off00014bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BC4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2